|
|
@@ -0,0 +1,66 @@
|
|
|
+// Copyright 2024 The frp Authors
|
|
|
+//
|
|
|
+// Licensed under the Apache License, Version 2.0 (the "License");
|
|
|
+// you may not use this file except in compliance with the License.
|
|
|
+// You may obtain a copy of the License at
|
|
|
+//
|
|
|
+// http://www.apache.org/licenses/LICENSE-2.0
|
|
|
+//
|
|
|
+// Unless required by applicable law or agreed to in writing, software
|
|
|
+// distributed under the License is distributed on an "AS IS" BASIS,
|
|
|
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
|
+// See the License for the specific language governing permissions and
|
|
|
+// limitations under the License.
|
|
|
+
|
|
|
+package system
|
|
|
+
|
|
|
+import (
|
|
|
+ "context"
|
|
|
+ "net"
|
|
|
+ "os/exec"
|
|
|
+ "strings"
|
|
|
+ "time"
|
|
|
+)
|
|
|
+
|
|
|
+func EnableCompatibilityMode() {
|
|
|
+ fixTimezone()
|
|
|
+ fixDNSResolver()
|
|
|
+}
|
|
|
+
|
|
|
+// fixTimezone is used to try our best to fix timezone issue on some Android devices.
|
|
|
+func fixTimezone() {
|
|
|
+ out, err := exec.Command("/system/bin/getprop", "persist.sys.timezone").Output()
|
|
|
+ if err != nil {
|
|
|
+ return
|
|
|
+ }
|
|
|
+ loc, err := time.LoadLocation(strings.TrimSpace(string(out)))
|
|
|
+ if err != nil {
|
|
|
+ return
|
|
|
+ }
|
|
|
+ time.Local = loc
|
|
|
+}
|
|
|
+
|
|
|
+// fixDNSResolver will first attempt to resolve google.com to check if the current DNS is available.
|
|
|
+// If it is not available, it will default to using 8.8.8.8 as the DNS server.
|
|
|
+// This is a workaround for the issue that golang can't get the default DNS servers on Android.
|
|
|
+func fixDNSResolver() {
|
|
|
+ // First, we attempt to resolve a domain. If resolution is successful, no modifications are necessary.
|
|
|
+ // In real-world scenarios, users may have already configured /etc/resolv.conf, or compiled directly
|
|
|
+ // in the Android environment instead of using cross-platform compilation, so this issue does not arise.
|
|
|
+ if net.DefaultResolver != nil {
|
|
|
+ timeoutCtx, cancel := context.WithTimeout(context.Background(), time.Second)
|
|
|
+ defer cancel()
|
|
|
+ _, err := net.DefaultResolver.LookupHost(timeoutCtx, "google.com")
|
|
|
+ if err == nil {
|
|
|
+ return
|
|
|
+ }
|
|
|
+ }
|
|
|
+ // If the resolution fails, use 8.8.8.8 as the DNS server.
|
|
|
+ // Note: If there are other methods to obtain the default DNS servers, the default DNS servers should be used preferentially.
|
|
|
+ net.DefaultResolver = &net.Resolver{
|
|
|
+ PreferGo: true,
|
|
|
+ Dial: func(ctx context.Context, network, _ string) (net.Conn, error) {
|
|
|
+ return net.Dial(network, "8.8.8.8:53")
|
|
|
+ },
|
|
|
+ }
|
|
|
+}
|
fatedier